2015-06-01 09:35:51 +00:00
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package com.bytezone.diskbrowser.disk;
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import java.awt.AWTEventMulticaster;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.io.BufferedInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import java.util.zip.CRC32;
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import java.util.zip.Checksum;
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2016-02-24 02:13:52 +00:00
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import com.bytezone.common.Utility;
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2015-06-01 09:35:51 +00:00
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import com.bytezone.diskbrowser.applefile.AppleFileSource;
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2016-02-24 21:11:14 +00:00
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import com.bytezone.diskbrowser.utilities.FileFormatException;
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import com.bytezone.diskbrowser.utilities.HexFormatter;
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2015-06-01 09:35:51 +00:00
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public class AppleDisk implements Disk
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{
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static final String newLine = String.format ("%n");
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static final int MAX_INTERLEAVE = 3;
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public final File path;
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2015-12-17 23:00:00 +00:00
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private final byte[] diskBuffer; // contains the disk contents in memory
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2016-02-24 02:13:52 +00:00
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private int skip = 0;
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2015-06-01 09:35:51 +00:00
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2015-12-17 23:00:00 +00:00
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private final int tracks; // usually 35 for floppy disks
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private int sectors; // 8 or 16
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private int blocks; // 280 or 560
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2015-06-01 09:35:51 +00:00
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2015-12-17 23:00:00 +00:00
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private final int trackSize; // 4096
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public int sectorSize; // 256 or 512
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2015-06-01 09:35:51 +00:00
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private int interleave = 0;
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private static int[][] interleaveSector = //
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2015-12-17 23:00:00 +00:00
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{ { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }, // Dos
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{ 0, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 15 }, // Prodos
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{ 0, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 15 }, // Infocom
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{ 0, 6, 12, 3, 9, 15, 14, 5, 11, 2, 8, 7, 13, 4, 10, 1 } }; // CPM
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2015-06-01 09:35:51 +00:00
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2015-12-21 21:04:43 +00:00
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// Info from http://www.applelogic.org/TheAppleIIEGettingStarted.html
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// Block: 0 1 2 3 4 5 6 7 8 9 A B C D E F
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// Position: 0 8 1 9 2 A 3 B 4 C 5 D 6 E 7 F - Prodos (.PO disks)
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// Position: 0 7 E 6 D 5 C 4 B 3 A 2 9 1 8 F - Dos (.DO disks)
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2015-06-01 09:35:51 +00:00
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private boolean[] hasData;
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private ActionListener actionListenerList;
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private List<DiskAddress> blockList;
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2016-02-24 02:13:52 +00:00
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private final boolean debug = false;
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2015-06-01 09:35:51 +00:00
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public AppleDisk (File path, int tracks, int sectors) throws FileFormatException
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{
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assert (path.exists ()) : "No such path :" + path.getAbsolutePath ();
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assert (!path.isDirectory ()) : "File is directory :" + path.getAbsolutePath ();
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assert (path.length () <= Integer.MAX_VALUE) : "File too large";
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assert (path.length () != 0) : "File empty";
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String name = path.getName ();
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int pos = name.lastIndexOf ('.');
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2016-02-24 02:13:52 +00:00
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byte[] buffer = getPrefix (path); // HDV could be a 2mg
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String prefix = new String (buffer, 0, 4);
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if ((pos > 0 && name.substring (pos + 1).equalsIgnoreCase ("2mg"))
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|| "2IMG".equals (prefix))
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// if ("2IMG".equals (prefix))
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2015-06-01 09:35:51 +00:00
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{
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2016-02-24 02:13:52 +00:00
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if (debug)
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System.out.println (Utility.toHex (buffer));
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// http://apple2.org.za/gswv/a2zine/Docs/DiskImage_2MG_Info.txt
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if ("2IMG".equals (prefix))
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{
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if (debug)
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{
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String creator = new String (buffer, 4, 4);
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System.out.printf ("Prefix : %s%n", prefix);
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System.out.printf ("Creator : %s%n", creator);
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int headerSize = Utility.getWord (buffer, 8);
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System.out.printf ("Header : %d%n", headerSize);
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int version = Utility.getWord (buffer, 10);
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System.out.printf ("Version : %d%n", version);
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System.out.printf ("Format : %02X%n", buffer[12]);
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}
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int diskData = Utility.getLong (buffer, 28);
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if (debug)
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System.out.printf ("Data size : %08X (%,d)%n", diskData, diskData);
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blocks = HexFormatter.intValue (buffer[20], buffer[21]); // 1600
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if (debug)
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System.out.printf ("Blocks : %,d%n", blocks);
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int format = buffer[12] & 0xFF;
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// if (blocks == 0 && format == 1)
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{
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this.blocks = diskData / 4096 * 8; // reduces blocks to a legal multiple
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if (debug)
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System.out.printf ("Blocks : %,d%n", blocks);
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}
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this.sectorSize = 512;
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this.trackSize = 8 * sectorSize;
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skip = Utility.getWord (buffer, 8);
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tracks = blocks / 8; // change parameter
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sectors = 8; // change parameter
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}
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else
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{
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System.out.println ("Not a 2mg file");
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this.blocks = (int) path.length () / 4096 * 8; // reduces blocks to a legal multiple
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this.sectorSize = 512;
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this.trackSize = sectors * sectorSize;
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}
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2015-06-01 09:35:51 +00:00
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}
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else if (pos > 0 && name.substring (pos + 1).equalsIgnoreCase ("HDV"))
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{
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2015-12-17 23:00:00 +00:00
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this.blocks = (int) path.length () / 4096 * 8; // reduces blocks to a legal multiple
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2015-06-01 09:35:51 +00:00
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this.sectorSize = 512;
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this.trackSize = sectors * sectorSize;
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}
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else
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{
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this.blocks = tracks * sectors;
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this.sectorSize = (int) path.length () / blocks;
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this.trackSize = sectors * sectorSize;
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}
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if (false)
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{
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2016-02-24 02:13:52 +00:00
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System.out.println ();
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System.out.printf ("File name : %s%n", path.getName ());
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System.out.printf ("File size : %,d%n", path.length ());
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2015-06-01 09:35:51 +00:00
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System.out.println ("Tracks : " + tracks);
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System.out.println ("Sectors : " + sectors);
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System.out.println ("Blocks : " + blocks);
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System.out.println ("Sector size : " + sectorSize);
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System.out.println ("Track size : " + trackSize);
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System.out.println ();
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}
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if (sectorSize != 256 && sectorSize != 512)
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{
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System.out.println ("Invalid sector size : " + sectorSize);
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new Exception ().printStackTrace ();
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}
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if (sectorSize != 256 && sectorSize != 512)
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throw new FileFormatException ("Invalid sector size : " + sectorSize);
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this.path = path;
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this.tracks = tracks;
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this.sectors = sectors;
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diskBuffer = new byte[tracks * sectors * sectorSize];
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hasData = new boolean[blocks];
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2016-02-24 02:13:52 +00:00
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if (debug)
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{
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System.out.printf ("DiskBuffer size : %,d%n", diskBuffer.length);
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System.out.printf ("Skip size : %,d%n", skip);
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}
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2015-06-01 09:35:51 +00:00
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try
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{
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BufferedInputStream file = new BufferedInputStream (new FileInputStream (path));
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if (skip > 0)
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file.skip (skip);
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file.read (diskBuffer);
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file.close ();
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}
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catch (IOException e)
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{
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e.printStackTrace ();
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System.exit (1);
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}
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checkSectorsForData ();
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}
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private byte[] getPrefix (File path)
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{
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byte[] buffer = new byte[64];
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try
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{
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BufferedInputStream file = new BufferedInputStream (new FileInputStream (path));
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file.read (buffer);
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file.close ();
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}
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catch (IOException e)
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{
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e.printStackTrace ();
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System.exit (1);
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}
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2016-02-24 02:13:52 +00:00
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2015-06-01 09:35:51 +00:00
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return buffer;
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}
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private void checkSectorsForData ()
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{
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2016-02-24 02:13:52 +00:00
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// force blockList to be rebuilt with the correct number/size of blocks
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blockList = null;
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2015-06-01 09:35:51 +00:00
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for (DiskAddress da : this)
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{
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2016-02-24 02:13:52 +00:00
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// System.out.println (da);
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2015-06-01 09:35:51 +00:00
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byte[] buffer = readSector (da);
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hasData[da.getBlock ()] = false;
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for (int i = 0; i < sectorSize; i++)
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if (buffer[i] != 0)
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{
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hasData[da.getBlock ()] = true;
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break;
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}
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}
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}
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/*
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* Routines that implement the Disk interface
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*/
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@Override
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public int getSectorsPerTrack ()
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{
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return trackSize / sectorSize;
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}
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@Override
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public int getTrackSize ()
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{
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return trackSize;
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}
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@Override
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public int getBlockSize ()
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{
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return sectorSize;
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}
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@Override
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public int getTotalBlocks ()
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{
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return blocks;
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}
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@Override
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public int getTotalTracks ()
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{
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return tracks;
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}
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@Override
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public boolean isSectorEmpty (DiskAddress da)
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{
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return !hasData[da.getBlock ()];
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}
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@Override
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public boolean isSectorEmpty (int block)
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{
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return !hasData[block];
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}
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@Override
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public boolean isSectorEmpty (int track, int sector)
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{
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return !hasData[getDiskAddress (track, sector).getBlock ()];
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}
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@Override
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public File getFile ()
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{
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return path;
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}
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@Override
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public byte[] readSector (DiskAddress da)
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{
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byte[] buffer = new byte[sectorSize];
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readBuffer (da, buffer, 0);
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return buffer;
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}
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@Override
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public byte[] readSectors (List<DiskAddress> daList)
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{
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byte[] buffer = new byte[daList.size () * sectorSize];
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int bufferOffset = 0;
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for (DiskAddress da : daList)
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{
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if (da != null) // text files may have gaps
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readBuffer (da, buffer, bufferOffset);
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bufferOffset += sectorSize;
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}
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return buffer;
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}
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@Override
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public byte[] readSector (int track, int sector)
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{
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return readSector (getDiskAddress (track, sector));
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}
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@Override
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public byte[] readSector (int block)
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{
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return readSector (getDiskAddress (block));
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}
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@Override
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public int writeSector (DiskAddress da, byte[] buffer)
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{
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System.out.println ("Not yet implemented");
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return -1;
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}
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@Override
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public void setInterleave (int interleave)
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{
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assert (interleave >= 0 && interleave <= MAX_INTERLEAVE) : "Invalid interleave";
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this.interleave = interleave;
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checkSectorsForData ();
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if (actionListenerList != null)
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notifyListeners ("Interleave changed");
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}
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@Override
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public int getInterleave ()
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{
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return interleave;
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}
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@Override
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public void setBlockSize (int size)
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{
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assert (size == 256 || size == 512) : "Invalid sector size : " + size;
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if (sectorSize == size)
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return;
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sectorSize = size;
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sectors = trackSize / sectorSize;
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blocks = tracks * sectors;
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System.out.printf ("New blocks: %d%n", blocks);
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hasData = new boolean[blocks];
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checkSectorsForData ();
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if (actionListenerList != null)
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notifyListeners ("Sector size changed");
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}
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@Override
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public DiskAddress getDiskAddress (int block)
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{
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if (!isValidAddress (block))
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{
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System.out.println ("Invalid block : " + block);
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return null;
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}
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return new AppleDiskAddress (block, this);
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}
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@Override
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public List<DiskAddress> getDiskAddressList (int... blocks)
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{
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List<DiskAddress> addressList = new ArrayList<DiskAddress> ();
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for (int block : blocks)
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{
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assert (isValidAddress (block)) : "Invalid block : " + block;
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addressList.add (new AppleDiskAddress (block, this));
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}
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return addressList;
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|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public DiskAddress getDiskAddress (int track, int sector)
|
|
|
|
{
|
|
|
|
// should this return null for invalid addresses?
|
2015-12-17 23:00:00 +00:00
|
|
|
assert (isValidAddress (track, sector)) : "Invalid address : " + track + ", "
|
|
|
|
+ sector;
|
2015-06-01 09:35:51 +00:00
|
|
|
return new AppleDiskAddress (track, sector, this);
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public boolean isValidAddress (int block)
|
|
|
|
{
|
|
|
|
if (block < 0 || block >= this.blocks)
|
|
|
|
return false;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public boolean isValidAddress (int track, int sector)
|
|
|
|
{
|
|
|
|
if (track < 0 || track >= this.tracks)
|
|
|
|
return false;
|
|
|
|
if (sector < 0 || sector >= this.sectors)
|
|
|
|
return false;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public boolean isValidAddress (DiskAddress da)
|
|
|
|
{
|
|
|
|
return isValidAddress (da.getTrack (), da.getSector ());
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the only method that transfers data from the disk buffer to an output buffer.
|
|
|
|
* It handles sectors of 256 or 512 bytes, and both linear and interleaved sectors.
|
|
|
|
*/
|
|
|
|
private void readBuffer (DiskAddress da, byte[] buffer, int bufferOffset)
|
|
|
|
{
|
|
|
|
if (da.getDisk () != this)
|
|
|
|
{
|
|
|
|
System.out.println (da.getDisk ());
|
|
|
|
System.out.println (this);
|
|
|
|
}
|
|
|
|
|
|
|
|
assert da.getDisk () == this : "Disk address not applicable to this disk";
|
|
|
|
assert sectorSize == 256 || sectorSize == 512 : "Invalid sector size : " + sectorSize;
|
|
|
|
assert interleave >= 0 && interleave <= MAX_INTERLEAVE : "Invalid interleave : "
|
2015-12-17 23:00:00 +00:00
|
|
|
+ interleave;
|
2015-06-01 09:35:51 +00:00
|
|
|
int diskOffset;
|
|
|
|
|
|
|
|
if (sectorSize == 256)
|
|
|
|
{
|
2015-12-17 23:00:00 +00:00
|
|
|
diskOffset = da.getTrack () * trackSize
|
|
|
|
+ interleaveSector[interleave][da.getSector ()] * sectorSize;
|
2015-06-01 09:35:51 +00:00
|
|
|
System.arraycopy (diskBuffer, diskOffset, buffer, bufferOffset, sectorSize);
|
|
|
|
}
|
|
|
|
else if (sectorSize == 512)
|
|
|
|
{
|
2015-12-17 23:00:00 +00:00
|
|
|
diskOffset = da.getTrack () * trackSize
|
|
|
|
+ interleaveSector[interleave][da.getSector () * 2] * 256;
|
2015-06-01 09:35:51 +00:00
|
|
|
System.arraycopy (diskBuffer, diskOffset, buffer, bufferOffset, 256);
|
2015-12-17 23:00:00 +00:00
|
|
|
diskOffset = da.getTrack () * trackSize
|
|
|
|
+ interleaveSector[interleave][da.getSector () * 2 + 1] * 256;
|
2015-06-01 09:35:51 +00:00
|
|
|
System.arraycopy (diskBuffer, diskOffset, buffer, bufferOffset + 256, 256);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public void addActionListener (ActionListener actionListener)
|
|
|
|
{
|
|
|
|
actionListenerList = AWTEventMulticaster.add (actionListenerList, actionListener);
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public void removeActionListener (ActionListener actionListener)
|
|
|
|
{
|
|
|
|
actionListenerList = AWTEventMulticaster.remove (actionListenerList, actionListener);
|
|
|
|
}
|
|
|
|
|
|
|
|
public void notifyListeners (String text)
|
|
|
|
{
|
|
|
|
if (actionListenerList != null)
|
2015-12-17 23:00:00 +00:00
|
|
|
actionListenerList
|
|
|
|
.actionPerformed (new ActionEvent (this, ActionEvent.ACTION_PERFORMED, text));
|
2015-06-01 09:35:51 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
public AppleFileSource getDetails ()
|
|
|
|
{
|
|
|
|
return new DefaultAppleFileSource (toString (), path.getName (), null);
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public String toString ()
|
|
|
|
{
|
|
|
|
StringBuilder text = new StringBuilder ();
|
|
|
|
|
|
|
|
text.append ("Path............ " + path.getAbsolutePath () + newLine);
|
|
|
|
text.append (String.format ("File size....... %,d%n", path.length ()));
|
|
|
|
text.append ("Tracks.......... " + tracks + newLine);
|
|
|
|
text.append ("Sectors......... " + sectors + newLine);
|
|
|
|
text.append (String.format ("Blocks.......... %,d%n", blocks));
|
|
|
|
text.append ("Sector size..... " + sectorSize + newLine);
|
|
|
|
text.append ("Interleave...... " + interleave + newLine);
|
|
|
|
|
|
|
|
return text.toString ();
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public Iterator<DiskAddress> iterator ()
|
|
|
|
{
|
|
|
|
if (blockList == null)
|
|
|
|
{
|
|
|
|
blockList = new ArrayList<DiskAddress> (blocks);
|
|
|
|
for (int block = 0; block < blocks; block++)
|
|
|
|
blockList.add (new AppleDiskAddress (block, this));
|
|
|
|
}
|
2016-02-24 02:13:52 +00:00
|
|
|
|
2015-06-01 09:35:51 +00:00
|
|
|
return blockList.iterator ();
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public long getBootChecksum ()
|
|
|
|
{
|
|
|
|
byte[] buffer = readSector (0, 0);
|
|
|
|
Checksum checksum = new CRC32 ();
|
|
|
|
checksum.update (buffer, 0, buffer.length);
|
|
|
|
return checksum.getValue ();
|
|
|
|
}
|
|
|
|
}
|